TA PinkI know there is a company at RAF St Mawgan that do them. You can even design your own lining if you wish! I've seen ones lined with map (1:50000) design, tartan, and pics etc. Cost is around £40 which is pritty good for a personalised one i recon.
The name of the company escapes me, but i'm sure a sneaky call the station tel exchange will uncover who they are. Perhaps someone here might be able to help too.
TA Pink